they're talking to jimmy lee dykes through a ventilation pipe. they say they can hear the child crying for his parents. police say dykes is showing no signs of ending the standoff which is now in its fourth day. elizabeth prann live in midland city, alabama for us. what are you seeing activity wise where you are, elizabeth? >> reporter: well, in just the past hour or two we've seen an increase of activities. as you can see, the s.w.a.p. members over my shoulder going up that dirt road. the suspect's property is slightly behind those white buildings, and police have confirmed that they're communicating to the suspect with a pvc pipe. this is an example of what he's using to communicate. 4 inches, this is about 5 pounds, this is a 4-foot pvc pipe. we know there is 60 feet of pvc piping from the driveway or from the roadway of this suspect's property all the way to the bunker, and what we know from witnesses and neighbors is that that pvc piping is also going through additional buildings on that property. we are waiting for an update from authoritie